Matthias gabeibl



Init-rit tstrs strnt @fitta MATTHIAS GABRIEL, OF N EVVARK, NEW JERSEY.

Letters Patent No. 67,527, :lated August 6, 1867.

IMPROVEMENT IN ROTARY STEAM ENGINES.

@tige Sdgrtule referrer tu in tigers @Titten patent mit making part nttige same.

T0 ALL WHOM IT MAY CONCERN:

B'e it known that I, MATTHIAS GABRIEL, of Newark, in the county ofEssex, and State of New Jersey, have invented certain new and usefulImprovement-s in Rotary Engines; and I do hereby declare that thefollowinglis a full, clear, and exact description ot' the same,reference being had to the accompanying drawings, making a portion ofthis specification, in which Figure 1 is a vertical transverse sectionof a rotary engine constructed according to my invention.

Figure 2 is a side view of the same.

Similar letters of reference indicate corresponding parts in bothfigures.

This invention consists in the arrangement of two steam pipes orpassages at opposite sides of the cylinder of u rotary engine, and insuch relation with the rotating piston and the valve-chest of the sameas to insure a very eiiicient action of the steam upon the said piston.The invention further consists in a novel means, whereby the valve maybe properly operated with reference to the movement of the rotarypiston. The invention further consists in two sliding abutments operatedby a cam on the piston-shaft, and so arranged in relation with thehereinbeforementioned steam pipes orpassages that the pressure of thesteam upon the piston is rendered nearly continuous.

To enable others to understand the nature and construction of myinvention, Iwill proceed to describe it with reference to the drawings.

The cylinder ofthe engine is shown at A, and is supported by a suitablebase, a. This cylinder is furnished at its top or upper side with avalvechest', t, in which is placed the slide-valve B, and which isfurnished with an induction pipe, c. The eduction pipe or passage isshown at d, and of course communicates with the eductionchamber A* ofthe valve B. C and C* represent two steam pipes or passages, situatedone at each side of the cylinder, with their upper ends communicatingwith the valve-chest b, and their lower ends placed nearly opposite eachother and communicating with the interior of the cylinder A, as shown at6*, in fig. 1. The central transverse shaft e has secured upon it therotating piston D, which is of cylindrical form, and is furnished at oneside with a radially projecting abutment, f, the edges of which,ibeingprovided with packing of any suitable variety, are kept in close Contactwith the inner surface of the cylinder A as the said abutment is carriedaround by the rotation of the piston. E and E* indicate two slidingabutments which are situated in a horizontal position at opposite sidesof the cylinder A, one of the said sliding abutments being placed belowthe front b* of one of the steam pipes C 0*, and the other being locatedabove the corresponding opening a* of the other steam pipe.' The'sesli'ling abutments E E* work in suitable guides formed at the sides ofthe cylinder, as indicated at g, andare furnished with rods or stems, L,which, passing out through stuffing-boxes z', have their outerextremities firmly attached by curved straps B* to the ends of avibrating-bar, F, which is situated at one end of the cylinder A. Thecentral part of this bar F is curved, as shown in iig. 2, so that itsmovements may not be interfered with by the outwardly extending portiono t the sha-ft e, and has attached to it at a. suitable distance' aparttwo friction-rollers 7c, and secured upon the end just mentioned of theshaft e, between the aforesaid friction-rollers lc is a cam, G, thestraight portions a Z1 of the circumference of which act upon thefriction-rollers k, to vibrate the bar F, to operate the slidingabutments E, and the semicircular portion a of the said circumferenceserving to hold the bar F, and consequently the aforesaidabutments E E,in a stationary position at intervals during the operation of theengine, as' hereinafter more fully explained. That end ofthe shaft eopposite to that at which the cam G is secured is furnished with aneccentric, shown in dotted outline at I, and which operates aconnecting-1'od, m, the upper end of which is pivoted to an arm, n.,formed upon a toothed sector, r, which gears into a racli, s, providedupon the outer end of the valve-stem u, which passing through astuffing-hex, ci, has its inner end attached to the slide-valve B. Theparts being in the position shown in the drawings, the pressure of steamadmitted through the steam pipe C into the cylinder A, between thevsliding abutment Ei, and the ahutmentf of the piston D, upon theabutmentf, last mentioned, turns or partially rotates the piston, untilthe said abutmentfa-pproaches the part Z1* of thc steam pipe or passagev0?, whereupon the cam Gr operates the bar F to move outward the slidingabutment Ei, and bring inward the other sliding abutment E,simultaneously with which the eccentric I operates the valve B to permitthe steam to -pass inward through the pipe or passage (2*, into thespace in the cylinder between the sliding abutment E and theabutin'entfof the piston; the pressure of such steam upon theabutmentfcausing the piston to complete the revolution, so that, by thusadmitting steam to the cylinder alternately through the pipes orpassages C 0*, the continued rotation of the piston lis seeuredtheexhaust steam in front of the abutmentf of the piston passing outthrough each of the aforesaid pipes C 0*, alternately with the innordpessage'of steam through the same. The sliding obutments E E* are heldin the required stationery position while the steam is acting upon theabutmentfof the piston by the action of the semieirculzu part a of thecircumference of the com upon the adjacent frietion-roller of thevibrating-bar. The said com noting upon the said rollers only by Ineensof the straight portionsoi` such circumference to vibrate or slide thebnr to move the sliding abntments E in and out, as hcreinbeforeexplained.

1What I olaim os my invention, and desire to secure by Letters Potent,isi l The sliding abutmcnts E E*, when connected by the yoke or bar F,and operated .simultaneously by the .com G on the axis of the rotatingpiston D,v substantially as and for the purpose set forth.

MATTHIAS GABRIEL.

Witnesses:

J. W. CooMB's, G. W. REED.

